01702nas a2200145   4500008004100000245011800041210006900159260000800228300002700236490000800263520110700271100001901378700002901397856013001426       2017                        eng d00aOn-axis pulsed laser deposition of hybrid perovskite films for solar cell and broadband photo-sensor applications0 aOnaxis pulsed laser deposition of hybrid perovskite films for so  cAPR  aArticle Number: 1331070 v1213 aHigh quality hybrid perovskite films are grown by the pulsed laser deposition (PLD) process through target stoichiometry and gas ambient control in the commonly used on-axis geometry which is compatible with PLD of other materials such as metal oxides. The use of an off-stoichiometric target and a momentum softening gas mixture of argon and hydrogen (90%:10%) is shown to yield dense films in the on-axis geometry with excellent stoichiometry and optical quality. The band gap can be easily tuned from 1.6 to 2.3 eV with either mixed halide composite target or successive depositions of inter-diffusing MAPbBr(3) and MAPbI(3) layers. A photosensor based on PLD grown MAPbI(3) is shown to render impressive performance over the broad range of wavelengths from 375 to 800 nm at a voltage of 5V bias. A planar heterojunction solar cell based on the dry-processed on-axis PLD grown film exhibits a champion conversion efficiency of 10.9%. A heterostructure comprising in situ pulsed laser deposited Cu2O (p-type) followed by the hybrid perovskite film shows a rectifying characteristic and photoresponse.1 aBansode, Umesh1 aOgale, Satishchandra, B.  uhttps://library.ncl.res.in/content/axis-pulsed-laser-deposition-hybrid-perovskite-films-solar-cell-and-broadband-photo-sensor